CN201650909U - Hydraulic distributor of high-power tractor - Google Patents
Hydraulic distributor of high-power tractor Download PDFInfo
- Publication number
- CN201650909U CN201650909U CN2010201410994U CN201020141099U CN201650909U CN 201650909 U CN201650909 U CN 201650909U CN 2010201410994 U CN2010201410994 U CN 2010201410994U CN 201020141099 U CN201020141099 U CN 201020141099U CN 201650909 U CN201650909 U CN 201650909U
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- valve
- main
- oil inlet
- communicated
- main valve
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- Expired - Fee Related
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Abstract
The utility model relates to a hydraulic distributor of a high-power tractor, which comprises a distributor body that is provided with a main valve cavity and a hydraulic control valve cavity that are arranged in a horizontal way, wherein a main valve core enters the main valve cavity; a main one-way valve is positioned in the main valve cavity; a check block is positioned between the front end of the main valve core and the rear end of the main one-way valve; the check block is connected with the main valve cavity in a sealing way; the rear end of the valve core of the main one-way valve and a check block core are connected with the check block, through which the check block core penetrates; the hydraulic control valve cavity is internally provided with a hydraulic control one-way valve, a valve body of which is provided with a step which is in interference fit with the hydraulic control valve cavity; a first oil return hole is covered by the valve body of the hydraulic control one-way valve; the main valve cavity is communicated with an oil inlet channel between the check block and a valve body of the main one-way valve; and a hydraulic channel communicated with a hydraulic cylinder is covered by the valve body of the main one-way valve.
Description
Technical field
The utility model relates to a kind of big-powered tractor pressure distributor.
Background technique
Hydraulic lifting system is one of important process device of farm tractor, and its effect is the operation farm implements, makes farm implements rise or landing to carry out farm work.As far back as the thirties in 20th century, hydraulic lifting system just begins to be applied on the tractor in large quantities.Hydraulic lifting system have mobility good, can realize advantages such as tilling depth adjusting.The hydraulic lifting system of China's large and middle tractor adopts switch control mostly at present, has only simple lifting function, and in use for some time, is prone to the fault that farm implements can not normally rise or descend, and higher repair rate is arranged.Especially in busy farming season,, can greatly influence peasant work in case break down.And the manipulation of China's large and middle tractor at present is to pull operating handle by hand substantially, and very inconvenience, and validity is often judged by range estimation and intuition that people urgently look forward to using reliable, the convenient tractor of handling.
Summary of the invention
The deficiency of, poor reliability low for troublesome poeration, the precision of the hydraulic lifting system that overcomes existing big-powered tractor, the utility model provides the big-powered tractor pressure distributor of a kind of convenient manipulation, precision height, good reliability.
The technological scheme that its technical problem that solves the utility model adopts is:
A kind of big-powered tractor pressure distributor, comprise distributor body, described distributor body is provided with horizontally disposed main valve chamber and hydraulic control valve pocket, main valve plug stretches in the described main valve chamber, main one-way valve is positioned at main valve chamber, be provided with block between the front end of described main valve plug and the rear end of described main one-way valve, described block and described main valve chamber are tightly connected, the spool rear end of described main one-way valve is connected with the block core. and described block core passes block, described main valve plug outer ring is provided with first step, second step and the 3rd step, described first step, second step and the 3rd step all with described main valve chamber interference fit, main valve chamber and system's oil inlet passage between first step and second step, first drainback passage is communicated with, the main valve chamber at described first step place and first oil inlet passage, second oil inlet passage is communicated with, described second step is communicated with the 3rd oil inlet passage with main valve chamber between the 3rd step, described the 3rd step is the main valve chamber between described second step and the 3rd step, valve between second drainback passage, described second drainback passage is communicated with second return opening;
In the described hydraulic control valve pocket Pilot operated check valve is set, the valve body of described Pilot operated check valve is provided with the 4th step, described the 4th step and hydraulic control valve pocket interference fit, described second oil inlet passage is communicated with the hydraulic control valve pocket of described Pilot operated check valve one side, described first drainback passage is communicated with the hydraulic control valve pocket of described Pilot operated check valve opposite side, and first return opening is stated in the body cap residence of described Pilot operated check valve;
Main valve chamber is communicated with the 4th oil inlet passage between the valve body of described block and described main one-way valve, and described the 4th oil inlet passage all is communicated with first oil inlet passage, the 3rd oil inlet passage, and the valve body of described main one-way valve covers the hydraulic channel that is communicated with oil hydraulic cylinder.
The valve body one side suit hydraulic control spring of described Pilot operated check valve.
The beneficial effects of the utility model mainly show: the optimization of (1) structure: the structure after the improvement has only kept 1 one-way valve, has increased the reliability of sealing; Thus, main valve also from the rectilinear direct-acting type that becomes, has reduced the wearing and tearing of one-way valve spool and valve core of main valve to the mechanical way of propelling of one-way valve.
(2) used Pilot operated check valve, overall structure is simple: control the opening and closing of Pilot operated check valve by the motion of main valve, active force is consistent with moving direction.
(3) control of rate of descent: main control valve in the structure after the improvement (3-position 4-way) has the function of rate of descent modulating valve concurrently.
Description of drawings
Fig. 1 is the structural drawing of distributor of the present utility model.
Fig. 2 is the hydraulic principle schematic representation.
Fig. 3 is the schematic representation of the distributor of propradation.
Fig. 4 is the schematic representation of the distributor of neutral condition.
Fig. 5 is the schematic representation of the distributor of decline state.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
With reference to Fig. 1～Fig. 5, a kind of big-powered tractor pressure distributor, comprise distributor body 5, described distributor body 5 is provided with horizontally disposed main valve chamber and hydraulic control valve pocket, main valve plug 1 stretches in the described main valve chamber, main one-way valve 3 is positioned at main valve chamber, be provided with block 2 between the rear end of the front end of described main valve plug 1 and described main one-way valve 3, described block 2 is tightly connected with described main valve chamber, the spool rear end of described main one-way valve 3 is connected with the block core. and described block core passes block 2, described main valve plug 1 outer ring is provided with first step, second step and the 3rd step, described first step, second step and the 3rd step all with described main valve chamber interference fit, main valve chamber and system's oil inlet passage between first step and second step, first drainback passage is communicated with, the main valve chamber at described first step place and first oil inlet passage, second oil inlet passage is communicated with, described second step is communicated with the 3rd oil inlet passage with main valve chamber between the 3rd step, described the 3rd step is the main valve chamber between described second step and the 3rd step, valve between second drainback passage, described second drainback passage is communicated with second return opening;
In the described hydraulic control valve pocket Pilot operated check valve 4 is set, the valve body of described Pilot operated check valve 4 is provided with the 4th step, described the 4th step and hydraulic control valve pocket interference fit, described second oil inlet passage is communicated with the hydraulic control valve pocket of described Pilot operated check valve one side, described first drainback passage is communicated with the hydraulic control valve pocket of described Pilot operated check valve opposite side, and first return opening is stated in the body cap residence of described Pilot operated check valve 4;
Main valve chamber is communicated with the 4th oil inlet passage between the valve body of described block 2 and described main one-way valve 3, and described the 4th oil inlet passage all is communicated with first oil inlet passage, the 3rd oil inlet passage, and the valve body of described main one-way valve 3 covers the hydraulic channel that is communicated with oil hydraulic cylinder.
The valve body one side suit hydraulic control spring of described Pilot operated check valve 5.
In the present embodiment, novel dispensing arrangement mainly contains formations such as main valve plug 1, block 2, main one-way valve 3, distributor body 4, Pilot operated check valve 5 as shown in Figure 1.Its hydraulic schematic diagram such as Fig. 2.Wherein main valve is a three-position four-way valve, except realizing three kinds of functions of rising, neutrality, decline of elevator system, has the effect of speed-regulating valve concurrently, and original rate of descent modulating valve is not only saved in such design, and is easier to realize automation control.
Concrete oil circuit such as oil inlet passage, oil return is shown in Fig. 3,4,5 three figure, and wherein the direction of arrow is the oil circuit trend.
Shown in Fig. 2 distributor hydraulic schematic diagram, the working state of distributor is divided into lifting, neutrality, the three kinds of states that descend, and mainly is to realize by the position that changes main valve plug.
(1) promote shown in the distributor schematic diagram, when valve core of main valve is in outmost the time, Pilot operated check valve is closed, and this moment, system's fluid entered oil inlet passage, under the effect of hydraulic coupling the one-way valve spool was backed down, and promoted the oil hydraulic cylinder motion.
(2) neutrally move right a position (when promptly mediating) when valve core of main valve 1, the oil circuit of oil inlet passage and Pilot operated check valve is closed, fluid-control one-way opening of valves, the direct oil sump tank of the oil-feed of system; Under the self-locking action of one-way valve, keep motionless in the oil cylinder.
(3) descend and to move right a position when being in inner position (be spool) again when valve core of main valve 1, the oil circuit of oil inlet passage and Pilot operated check valve is closed, fluid-control one-way opening of valves, the direct oil sump tank of the oil-feed of system; Valve core of main valve moves right by promoting the block core, leans on the spool jack-up of the effect of this mechanical force with main one-way valve, makes one-way valve be in open mode, and in-oil cylinder fluid is at the dirty oil sump tank of effect of system load deadweight, thus generation decline effect.
Stressed excessive for fear of main valve plug, the block of design has solved this problem: when system is in ascent stage, can form high pressure at oil inlet passage, because main valve plug two direction lifting surface areas are inconsistent, can produce great active force to it,, design this link stopper especially for fear of producing this active force, make the main valve plug two ends stressed less, easy operating.Therefore block has 2 effects: (1) can back down nonreturn valve core by the intermediation of block when main valve plug moves right; (2) and when system was in ascent stage, block had played again and prevented that main valve plug is subjected to the power of surging greatly.
Main valve plug has the rate of descent regulatory function concurrently except realizing lifter rising, neutrality, decline function: as shown in Figure 3, when main valve plug moves right, will promote block and move right, and back down nonreturn valve core, thereby realize the decline function.And rate of descent depends on the size of one-way valve opening amount, and therefore the size of one-way valve opening amount can realize the rate of descent regulatory function by the position of control main valve plug by the determining positions of main valve plug.
The working principle of Pilot operated check valve is as follows: when system was in propradation, as shown in Figure 3, the Pilot operated check valve two ends were all through-flow, and under the effect of spring force, Pilot operated check valve is closed; When system is in neutrality or decline state, shown in Fig. 4,5, place spring terminal place liquid stream and close, under the effect of the other end pressure, the fluid-control one-way valve core is backed down the fluid oil return.
Claims (2)
1. big-powered tractor pressure distributor, comprise distributor body, it is characterized in that: described distributor body is provided with horizontally disposed main valve chamber and hydraulic control valve pocket, main valve plug stretches in the described main valve chamber, main one-way valve is positioned at main valve chamber, be provided with block between the front end of described main valve plug and the rear end of described main one-way valve, described block and described main valve chamber are tightly connected, the spool rear end of described main one-way valve is connected with the block core, described block core passes block, described main valve plug outer ring is provided with first step, second step and the 3rd step, described first step, second step and the 3rd step all with described main valve chamber interference fit, main valve chamber and system's oil inlet passage between first step and second step, first drainback passage is communicated with, the main valve chamber at described first step place and first oil inlet passage, second oil inlet passage is communicated with, described second step is communicated with the 3rd oil inlet passage with main valve chamber between the 3rd step, described the 3rd step is the main valve chamber between described second step and the 3rd step, valve between second drainback passage, described second drainback passage is communicated with second return opening;
In the described hydraulic control valve pocket Pilot operated check valve is set, the valve body of described Pilot operated check valve is provided with the 4th step, described the 4th step and hydraulic control valve pocket interference fit, described second oil inlet passage is communicated with the hydraulic control valve pocket of described Pilot operated check valve one side, described first drainback passage is communicated with the hydraulic control valve pocket of described Pilot operated check valve opposite side, and first return opening is stated in the body cap residence of described Pilot operated check valve;
Between the valve body of described block and described main one-way valve main valve chamber and the 4th oil inlet passage together with, described the 4th oil inlet passage all is communicated with first oil inlet passage, the 3rd oil inlet passage, the valve body of described main one-way valve covers the hydraulic channel that is communicated with oil hydraulic cylinder.
2. big-powered tractor pressure distributor as claimed in claim 1 is characterized in that: the valve body one side suit hydraulic control spring of described Pilot operated check valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201410994U CN201650909U (en) | 2010-03-25 | 2010-03-25 | Hydraulic distributor of high-power tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201410994U CN201650909U (en) | 2010-03-25 | 2010-03-25 | Hydraulic distributor of high-power tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201650909U true CN201650909U (en) | 2010-11-24 |
Family
ID=43116144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201410994U Expired - Fee Related CN201650909U (en) | 2010-03-25 | 2010-03-25 | Hydraulic distributor of high-power tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201650909U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629178A (en) * | 2013-10-28 | 2014-03-12 | 张发院 | Hydraulic distribution system of wet spraying machine |
| CN106015146A (en) * | 2016-07-18 | 2016-10-12 | 山东弘宇农机股份有限公司 | Built-in hydraulic distributor |
-
2010
- 2010-03-25 CN CN2010201410994U patent/CN201650909U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629178A (en) * | 2013-10-28 | 2014-03-12 | 张发院 | Hydraulic distribution system of wet spraying machine |
| CN106015146A (en) * | 2016-07-18 | 2016-10-12 | 山东弘宇农机股份有限公司 | Built-in hydraulic distributor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20130325 |